Unilock now offers their own version of a material similar to Geo-grid that is specifically used for your application. I don,t think it is quite as expensive as regular Geo-grid and by the way it looks it is a definite investment for paver drives that have heavy traffic or large vehicles parked on them for extended periods of time. Go on their website and check it out.

Just stick with a good solid base and edge restraint. The geogrid is overkill imo.

extensive testing has been done with the use of different geotextiles in gravel base construction. without getting into extreme and boring detail the use of geogrids in base construction improves its performance. Type of geogrid is very important.

Under cyclic loading, the use of geogrid noticeably improved the bearing capacity and reduced the vertical deformation depth compared with the unreinforced cases. The geogrid layer placed at the interface between the base layer and the subgrade reduced the vertical deformation depth by 18–54% depending on the base course layer thickness.

The most effective location of one geogrid layer is in the upper quarter of the base course layer. Additional geogrid layer at the interface between the base course layer and the subgrade decreased the vertical deformation depth by about 26%. The use of two layers of geogrid at the interface and at the upper quarter of base course layer improved the bearing capacity and decreased the thickness of the required base course layer by about 34%.

Geogrid with higher tensile strength provided better performance than others with the same aperture size. The use of geogrid with improper aperture size and higher tensile strength produced a vertical deformation depth greater than that created by geogrid with lower value of tensile strength but with a suitable aperture size.

-Eliminates the need for overdig or over excavation and disposal of poor soils
-Reduces labor and equipment requirements